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-rw-r--r--llvm/lib/Target/ARM/ARMISelLowering.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/llvm/lib/Target/ARM/ARMISelLowering.cpp b/llvm/lib/Target/ARM/ARMISelLowering.cpp
index 5cf9a2fc2bf..469ceb9c213 100644
--- a/llvm/lib/Target/ARM/ARMISelLowering.cpp
+++ b/llvm/lib/Target/ARM/ARMISelLowering.cpp
@@ -14645,6 +14645,9 @@ ARMTargetLowering::shouldExpandAtomicLoadInIR(LoadInst *LI) const {
// and up to 64 bits on the non-M profiles
TargetLowering::AtomicExpansionKind
ARMTargetLowering::shouldExpandAtomicRMWInIR(AtomicRMWInst *AI) const {
+ if (AI->isFloatingPointOperation())
+ return AtomicExpansionKind::CmpXChg;
+
unsigned Size = AI->getType()->getPrimitiveSizeInBits();
bool hasAtomicRMW = !Subtarget->isThumb() || Subtarget->hasV8MBaselineOps();
return (Size <= (Subtarget->isMClass() ? 32U : 64U) && hasAtomicRMW)
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